Spray gun



' oct. z5, 1932. o, R YOST 1,884,485

SPRAY GUN Filed Deo. 51, 1929 Patented Cet. 25, 1932 FFlCE OLIVER P. YOST, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO FOOD MACHINERY CORPORATEON SPRAY GUN Application filed. December 31, 1929. Serial No. 417,733.

io being built up of piping and fittings as is `made of asingle 'castinm shown in the Boyce patent; and also to the construction of the valve stein.

. Ity has been found in using the Boyce device that the spray head made up of fittings is rather diliicult end eXpensive to manufacture and have everything line up nicely for final assembling, also that the spray nozzles should be set atv an inclination of about 40 to enable Vthe operator to spray on the undery sides of leaves and plants and to assist iny reaching all parts of a'tree. lHeretofore the valve stem has been made .of one long piece with the spiral soldered thereto andv it caused no end of trouble on accountof the'spiral coming loose and thus putting the gun-out of use. until repaired. yThe spray head made ofv fittings developed leaks while in use 'whichinterfered more or'less with eicient operation.

It is therefore anV object of the invention to provide ar spray device having a spray head vIt isa further object of the invention to make a spray device having a plurality of spray nozzles inclined at an` angle from the axis 'of the stem'tliereof in two different diy rections.

Itis a further object of the'invention to provide a valve stein of improved construction and efficiency.

V."W ith suoli ob ects in view as well as other advantages which may be inherent in the invention, consisting in the part-s and combinations Ehereinafter set 'forth and claimed, it

is understood that the several necessary elements and combinations constituting the `samemay ybe varied in their proportions,

placement and general arrangement without departing from the nature and scope of the invention. `In order to make the invention more clearly understood there are shown iii the accompanying drawing, more or less diagrammatically, the preferred means and mechanism for placing the saine in concrete form, without limiting the improvements iii their applications to the particular construci tion chosen to illustrate the invention.

Referring now to the dra-wing Figure 1 is a side elevation of t ie complete spray lgun showing the 40o inclination to the spray nozzles.

Figure 2 is a plan of Figure l, showing the manner of inclining the spray nozzles in two different directions relative to the longitudiiial axis of the gun.

' Figure 3 is a similar view to Figure 2 but on a larger'scale and making it a sectional view to clearly show vthe interior construction of the gun.

Figure el is a detail taken on approximately the liiie 444 of Figure 3 showing the construction of the spray nozzle.

Figure 5 is a plan view of the spray nozzle of Figure i sli-owing the inclination of the holes to produce a swirling spray when the valve stein is set in a certain position.

l represents the main tubular body of the spray gun. 2 a connection at the handle end to which a hose may be attached to deliver spray material to the gun, the hose is not shown, but is of the ordina-ry and well known type used for this purpose. 3 represents the one piece spray head which is here shown in one type of solid construction. l represents the valve stem secured to a spiral 6 that forms a part of the handle section, and 5 represents the spray nozzles or heads which are here shown as knurled screw on caps, it is understood of course that these heads may be' of heXagon shape as well, or any other shape desired.

ln the manufacture, sale and use of the Boyce gun referred to more or less trouble has been experienced by the users in having leaks develop in the pieced up spray head; the joints are hard to make tight and maintain tight in operation, and the conduits are more or less restricted at times on account of spelter getting in during the brazing operation, or if screwed together cracks are left at the joints to gather residue and gradually TLC) restrict the openings. By making the spray heads in one piece the difficulties are overcome at one stroke and a very e'fiicient reliable and durable spray gun produced.

The Y part of the spray head is on the same plane as the longitudinal axis of the gun While-the heads are set at approximately an angle of 40o thereto to enable the operator to project the spray material on the under Vsides of low lying plants without stooping or turning the entire gun sideways in order to try to get the spray where wanted. By setting the spray heads at the 40 angle it is seen that the head as a whole has two different angles relative to the axis of the gun or the tube 1, which has the advantage of placing the nozzles far enough apart to cover s. considerable area with whirling spray and of also getting under the leaves or in otherwise inaccessible places in the trees.

In the drawing I have shown a comparatively short gun but it may be lengthened conslderably without becoming unwieldy if thought desirable.

The valve stem in the Boyce gun as has been statedl has always been made of two pieces joining them at the screw section 6 y either soldering or brazing but it has been very diilicult to make a joint that would stand the constant strain of manipulating the vvalve while in operation without coming loose.

It will be observed that there are two separate conduits in the spray head 5, the

conduit 7 leads to the center opening of the spray nozzle which throws a long thin stream when it is desired to reach high places while the conduit 8 leads to the angularly disposed holes 9 in the disk 1() inside of the nozzle. The end 11 of the valve stem 4 prevents spray material from entering the conduit 7 when in the position shown in Figure 3 and will continue so to do as long as it is entered in the port 12. This permits moving the valve 13 from its seat to admit spray material to the head without letting it get into the conduit 7, so that only when the part 11 is com pletely withdrawn from the port 12 will the spray enter the conduit 7 and issue as a thin stream in addition to the whirling spray from the other holes 9 in the spray nozzles.

The adjustment of the sprays is controlled by the handle 11 always within easy reach of the operator and when once set for a certain condition of operation it may be released and the adjustment will remain until actually changed by a turning of the handle.

Referring further to the construction of vthe valvestem it will be seen by reference ation considerable strain is applied to t-he spiral in closing the valves and with the soldered construction referred to the spiral was continually coming loose and causing delay for repairs. With this improved construction, however, with the spiral an integral part of the handle section as much pressure may be applied as desired Without loosening anything. The spiral 6 as will be seen is larger in diameter than formerly so that it is better able to stand added pressure and will wear much longer. The diameter of the spiral is suflicient to permit of removing the entire valve stem from the handle end of the gun for such repairs as may be needed, in other words the diameter of the spiral 6 is greater than the valve head 13 so that the valve head 13 will pass through the opening in the handle end of the gun through the part 2. This is a very desirable feature,-

to enable quick removal for cleaning or refacing the valve and seat.

The extreme end of the valve stem has also a very important improvement in the particular Shape disclosed. It will be noted that the extreme end of the stem has a reduced extension that extends into the port 12 as shown at 15, while the portion 16 acts as a closure for the port 12 unless the spiral is turned down suficiently to draw the portiony 16 out of port 12 when solution will enter and pass through the conduits 7 and produce the long thin stream. It will also be noted that there is a reduced portion on the stem 4 between the portion 16 and the main valve 13 as at 17. The reduced portions 15 and 17 are for the .purpose of distributing the solution substantially kequally in the conduits 7 and 8 so that each nozzle will receive about filed or ground off until the proper'fiow of` liquid to the nozzles is obtained. The manner in which the flow of liquid is equalized by the extension 15 and the reduced portion 17 of the valve stem is through a properly proportioned retardation of the iow into the channels 7 and 8. It has been foundY that where only onerestriction is present as in prior devices the liquid under the pressures used tends to flow too freely into the channel 7 but by providing the pilot extension 15 there is just enough retardation to the iow to equalizel the flow into the two channels 7 and 8. This arrangement adds materially to the eflicient operation of the device.

The spray disk 10 is also made in an improved form. It Will be seen in Figure 4 that the disk l() has a central bevel counterbore that seats on a beveled nozzle at the end of port 7 Having described my invention, I claim as follows:

l. A spray device for spraying insecticides or fungicides on plants and trees comprising a spray head of one piece construction and having a plurality of limbs each provided with a plurality of conduits, and spray nozzles disposed on the ends of said limbs, a valve stem for controlling the admission of spray material into said plurality of conduits consisting of a seat member for cutting off admission of Spray material to all of said conduits, another portion on said stem for cutting 0E admission of spray material to one of said conduits and reduced portions as a part of said stem for restricting the inlets to said conduits and thereby effect a more even distribution of spray material thereto, when both admission inlets are open for the flow of spray material.

2. A spray device for spraying insecticides or fungicides on plants and trees comprising a spray head of one piece construction and having a plurality of limbs each provided With a plurality of conduits, with spray nozzles disposed on the ends of the limbs, separate ports for admitting spray material to each of said conduits, a single valve stem for controlling the flow of material to each of said ports, portions on said valve stem for remaining in said ports at all conditions of operation to oifer a proportioned retardation to the flow of material through said ports to thereby eiiect a more equalized flow to the several conduits.

In testimony whereof I affix my signature.

OLIVER P. YOST. 

